Edwin Beer from New York conceives the idea of using high-frequency electric current through a catheterizing-cytoscope to coagulate bladder tumors. Beer is considered to be the founder of electrosurgery of the bladder.[6]

Ametrcan urologist Theodore Davis, from South Carolina, presents a modified resectoscope, using a larger instrument with a larger viewing window and a wider loop. Davis incorporates both cutting and coagulation current diathermy, inventing a foot pedal allowing him to switch between the two during surgery.[14]